Non-equilibrium stage modeling and non-linear dynamic effects in the synthesis of TAME by reactive distillation

Katariya, Amit; Kamath, Ravindra S.; Moudgalya, Kannan M.; Mahajani, Sanjay M.

doi:10.1016/j.compchemeng.2007.11.009

Cited by 29 publications

(6 citation statements)

References 31 publications

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“…Modeling of RD column involves basic concept of distillation column carrying out reaction in a reactive zone in between the rectifying zone and stripping zone [18][19][20][21]. Thus modeling can be represented by various balances for different zones of reactive distillation column.…”

Section: Modeling Of Heterogeneous Catalyzed Packed Rdcmentioning

confidence: 99%

Reactive Distillation: Modeling, Simulation, and Optimization

Sakhre¹

2019

Distillation - Modelling, Simulation and Optimization

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Chemical process industries deal with production which further utilizes reaction followed by separation of the reaction mixtures. Reactive distillation is a new technique of combination of both reaction and separation in a single unit beneficial for equilibrium-limited reactions and also cost-effective. This makes it a highly complex process because many parameters involved in both reaction and separation are interactive in nature. In this chapter, modeling, simulation, and optimization of reactive distillation are presented. Methyl acetate production via reactive distillation is chosen as a case study. The results are compared for both experimental and simulation studies. The synthesis of methyl acetate was carried out in a packed RDC by catalytic esterification using acetic acid and methanol as reactants in a pilot-scale experimental setup. A strong acidic ion exchange catalyst, Amberlyst-15, was used to enhance the rate of heterogeneous esterification reaction. The result obtained was observed with change in various variables including the reflux ratio (RR), distillateto-feed (D/F) ratio, and bottom-to-feed (B/F) ratio with respect to product composition. The optimization and sensitivity analysis was carried out using Aspen Plus process simulation software.

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Section: Modeling Of Heterogeneous Catalyzed Packed Rdcmentioning

confidence: 99%

Reactive Distillation: Modeling, Simulation, and Optimization

Sakhre¹

2019

Distillation - Modelling, Simulation and Optimization

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“…The nonequilibrium stage, also known as the rate-based model, considers rate equations for mass and heat transfer, and phase equilibrium is assumed only at the phase interface rather than on the whole stage. The nonequilibrium stage models should be more precise for its possibility to eliminate the phenomena of multiple steady states and its ability to take the influence of hardware design into account. , Good agreement between the two kinds of models is achieved when correct Murphree stage efficiencies are assigned, yet they are difficult to predict for a multicomponent system. Despite its fine accuracy, the nonequilibrium stage model is relatively complex in mathematics and requires detailed design of column internals.…”

Section: Model Developmentmentioning

confidence: 99%

Reactive Distillation Column for Disproportionation of Trichlorosilane to Silane: Reducing Refrigeration Load with Intermediate Condensers

Huang

Ding

Jin

et al. 2013

Ind. Eng. Chem. Res.

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This paper presents a reactive distillation column for the catalytic disproportionation of trichlorosilane to silane which includes three consecutive reversible reactions with a thermodynamic conversion to silane as low as 0.2% and is of no practical significance using the conventional reactors. This reaction system is however characterized by a large distinction in the boiling points of the components, which makes the reactive distillation extremely favored. Nevertheless, the normal reactive distillation column possesses the shortage of high refrigeration requirement as the standard boiling point of the overhead product silane is −112 °C. A novel reactive distillation column with intercondensers placed within has been simulated using Aspen Plus package for a feasible alternative to alleviate this drawback. The calculated results show that a reduction in the refrigeration load of more than 97% can be obtained when one intermediate condenser is inserted between the rectifying and reaction zones, and that another normal intermediate condenser equipped within the reaction section can further decrease the condensation requirement of the first intermediate condenser by 50%. Effects of the configuration parameters and operational conditions have also been investigated for optimal design and operation of the proposed reactor.

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“…It is a widely studied model system to understand the complex behavior of reactive distillation (Katariya et al 2008). Al-Arfaz and studied the plantwide control of TAME reactive distillation column.…”

Section: Control Of Tame (2-methoxy 2-methylbutane) Rd Systemmentioning

confidence: 99%

Control of Reactive Distillation Column: A Review

Sharma¹,

Singh²

2010

International Journal of Chemical Reactor Engineering

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The objective of this paper is to give a critical survey of the present status within the field of control of a reactive distillation column. Control of a reactive distillation column is a challenging task due to process nonlinearity and complex interactions between the vapor-liquid equilibrium and chemical reactions. There are different types of control methodologies, which have been studied in the reactive distillation, ranging from a simple proportional-integral (PI) controller to advanced model predictive controllers (MPC) such as dynamic matrix control (DMC), quadratic dynamic matrix control (QDMC), robust multivariable predictive control technology (RMPCT), generalized predictive control (GPC), and other advanced control techniques. With the goals of optimal performance, energy conservation and cost effectiveness of process operations in industries, the design of optimal controllers and controller performance assessment have received great attention in both industries and academia. The main objective of control is to maintain the product purity within the desired range.

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Non-equilibrium stage modeling and non-linear dynamic effects in the synthesis of TAME by reactive distillation

Cited by 29 publications

References 31 publications

Reactive Distillation: Modeling, Simulation, and Optimization

Reactive Distillation: Modeling, Simulation, and Optimization

Reactive Distillation Column for Disproportionation of Trichlorosilane to Silane: Reducing Refrigeration Load with Intermediate Condensers

Control of Reactive Distillation Column: A Review

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